At the time, between the two world wars, there was both state-owned and private broadcasting.1)

Gustave-Auguste Ferrié, an army general since 1919, was a French radio pioneer, at work basically everywhere where a new radio station came out of the eggshell. Deemed essential for the further development of radio, he wasn’t retired when reaching the age limit.

Sacha Guitry (a broadcaster and film director), Yvonne Printemps (a singer) and General Ferrié at the inauguration of Radio Tour Eiffel, 1922Source: Wikimedia Commons

*) Some Radio Nacional de Espana interference, at times I=3
**) Modulation horrible
***) The language sounded like Russian to me. If one of you understands Russian, please let me know, and I’ll upload my recording of the transmission and publish the link. Would like to know if this was Ukranian or indeed Russian.